Artificial crown for teeth



(Model.)

A. E. MATTESON.

ARTIFICIAL GROWN FOR TEETH.

No. 280,052. Patented June 26, 1883.

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UNITED STATES PATENT OFFICE.

ARTHUR n. MATTESON, ol 'onIcAoo, ILLINOIS.

A RTIFICIAL CROWN FOR TEETH.

SPECIFICATION forming part of Letters Patent No. 280,052, dated June 26,1883.

- Application filed June 28, 1882. (Model.)

To all whom it may concern;

Be it known that I, ARTHUR E; DIATTESON, a citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Dental Crowns withPorcelain Fronts; and I hereby declare the following to be a full,clear, and exact description thereof, reference being had to theaccompanying draw-. mgs.

My invention relates to the construction of artificial crowns for teethand securing them in place to the roots; and it consists in theparticular construction which I employ for giving them firmness andstrength and facilitating the placing of them in position, all ashereinafter more fully set forth.

In the drawings, Figure 1 is a side elevation of a tooth provided withmy improvements; Fig. 2, a horizontal section on the line 2 2 of Fig. 3;Fig. 3, a central vertical section on the line 3 3 of Fig. 2, and Fig. 4a perspective view of the porcelain front.

'A is the root of the tooth, and B the metal portion of the crown. Thepart B-comprises the band 11, provided with the internal shoulderorflange, u, projecting inward, as shown, from a point about midway ofthe breadth of the band, and the parti extending upward from the bandand forming the inner wall of the crown. The band 1; and the wall t areformed in one piece out of metal plate by pressing or swaging the plateover a die of the required shape, and the shoulder a is subsequentlysoldered or otherwise secured in place to the inner surface of the band.The size and shape will of course vary according to the particularcircumstances and requirements. The part of the band below the shouldera snugly fits the top of the root, the lower face of the shoulderresting upon the root.

"One or more screws, 8, are driven into the top of the root at anydesired angle orangles, and the metal part B placed in'position upon theroot, as shown. j

O is afront, of porcelain, or a side, as the case may be, depending uponwhether the crown is to be fitted to a front or aside tooth. Thepeculiarity of this porcelain part is that it is provided 011 its innerface with a dovetailed recess, 9', preferably longitudinal, the purposeof which is to receive and be held by the cement or amalgam, q, withwhich the crown is filled. The porcelain part is made of the propershape to correspond with the other teeth, and supplements the innerwall, 15, as shown in the drawings, the edges of the metal being swagedor burnished down upon it. At its base it fits within the band 1) andrests upon the shoulder a, as shown in the drawings.

Among the chief merits of my invention are the ease, rapidity, andcertainty with which it may be applied, while the parts being puttogether as shown, and the interior of the crown filled with cement oramalgam, they are held together with very great firmness, the screw orscrews, together with the dovetailed recess in the porcelain front,forming the best possible media for uniting the porcelain front and theroot by means of the cement. The inwardly-projecting flange will befound of service in crowns differing otherwise from mine inconstruction.

What I claim as new, and desire to secure by Letters Patent, is

1. In a dental crown, the combination, with the metal backing extendedinto a band, o, of

a flange or shouldenu, projecting inward from a position about midway ofthe breadth of the band, substantially as described, and for the purposeset forth.

2. In an artificial crown, the p art B, of metal, comprising the band1), having the inwardlyprojecting flange a, and the inner wall, 25, incombinatiouwith the porcelain front or side 0, provided with thedovetailed recess r, sub stantially as described, and for the purposeset forth.

V ARTHUR E. MATTESON. In presence of- O. O. LIN'rIIIoUM, THOMAS A.BANNING.

